A growing number of U.S. coastal areas are flooding at high tide, even on sunny days. In less than 20 years (2000-May/June 2019), sunny-day flooding incidents nearly tripled (up 190%) in the southeastern U.S. and more than doubled (up 140%) in the northeastern U.S. Tidal flooding can disrupt traffic, swamp septic systems, ruin buildings and infrastructure, and salt farmland. The Mid Atlantic has been particularly hard hit, with new records for sunny-day flooding set last year in Washington, DC, Baltimore (Maryland), and Annapolis (Maryland). Researchers estimate that by 2050, Norfolk (Virginia) could see 170 days of high-tide flooding per year.
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